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Objective Questions

Latest IBPS RRB Officer Scale II Exam Question (Objective Questions), MCQ in English

Subjects : Professional Knowledge, Reasoning, Financial Awareness, English Language, Computer Knowledge, Quantitative Aptitude & Data Interpretation

Question Bank IBPS RRB Officer Scale II (IT) Exam - English
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Professional Knowledge

Question 1Single Answer
Which interface lets a user program request a protected operating-system service?
  1. A
    System call
  2. B
    Macro expansion
  3. C
    Preprocessor token
  4. D
    Linker directive
Question 2Single Answer
A process is best described as which of the following?
  1. A
    A passive executable file
  2. B
    Source code stored on disk
  3. C
    A compiler's symbol table
  4. D
    A program in execution
Question 3Single Answer
Which structure normally stores a process's saved registers and scheduling information?
  1. A
    File allocation table
  2. B
    Process control block
  3. C
    Superblock
  4. D
    Translation lookaside buffer
Question 4Single Answer
A process has all required resources except the CPU. What is its state?
  1. A
    Ready
  2. B
    Terminated
  3. C
    Blocked
  4. D
    Running
Question 5Single Answer
A running process issues a blocking disk read. Which state normally follows?
  1. A
    New
  2. B
    Waiting
  3. C
    Ready without waiting
  4. D
    Terminated
Question 6Single Answer
When an I/O operation completes, a blocked process normally moves to which state?
  1. A
    Suspended permanently
  2. B
    Terminated
  3. C
    Ready
  4. D
    New
Question 7Single Answer
Which Unix function creates a child process by duplicating the calling process?
  1. A
    execve()
  2. B
    waitpid()
  3. C
    fork()
  4. D
    close()
Question 8Single Answer
After a successful fork(), what return value does the child receive?
  1. A
    0
  2. B
    The parent's PID
  3. C
    -1
  4. D
    The child's own PID
Question 9Single Answer
What does a successful execve() primarily do?
  1. A
    Duplicates a file descriptor
  2. B
    Replaces the current process image
  3. C
    Waits for a child to terminate
  4. D
    Always creates a second process
Question 10Single Answer
Why does a parent process call wait() or waitpid()?
  1. A
    To replace its executable image
  2. B
    To lock every open file
  3. C
    To obtain a new virtual address space
  4. D
    To collect a child's termination status
Question 11Single Answer
A terminated child whose exit status has not been collected is called what?
  1. A
    Daemon process
  2. B
    Zombie process
  3. C
    Ready process
  4. D
    Kernel thread
Question 12Single Answer
An orphan process is one whose parent has done what?
  1. A
    Terminated while the child remains alive
  2. B
    Opened a shared file
  3. C
    Entered a critical section
  4. D
    Collected its exit status
Question 13Single Answer
What is saved and restored during a context switch between processes?
  1. A
    The entire operating-system source code
  2. B
    CPU execution context
  3. C
    Only the disk partition table
  4. D
    Only the executable filename
Question 14Single Answer
Which instruction category should normally require privileged execution?
  1. A
    Calling an ordinary user function
  2. B
    Comparing two integers
  3. C
    Changing memory-protection control registers
  4. D
    Adding two user variables
Question 15Single Answer
Which mechanism transfers control from user mode into the kernel for a service request?
  1. A
    A controlled trap or system-call instruction
  2. B
    A local variable declaration
  3. C
    Ordinary string concatenation
  4. D
    A source-code comment
Question 16Single Answer
Which Unix system call obtains the calling process's identifier?
  1. A
    getppid()
  2. B
    getuid()
  3. C
    getpid()
  4. D
    getcwd()
Question 17Single Answer
Which IPC mechanism provides a byte stream commonly used between related Unix processes?
  1. A
    Interrupt vector
  2. B
    Page table
  3. C
    Pipe
  4. D
    Inode bitmap
Question 18Single Answer
What is the main advantage of shared-memory IPC after the region is established?
  1. A
    Processes can exchange data without copying each message through the kernel
  2. B
    Memory protection is disabled system-wide
  3. C
    Synchronization becomes unnecessary
  4. D
    All processes receive identical PIDs
Question 19Single Answer
Which statement correctly distinguishes a program from a process?
  1. A
    Several processes can execute the same program
  2. B
    Programs always have scheduling states
  3. C
    A program must always have exactly one process
  4. D
    A process exists only on secondary storage
Question 20Single Answer
Starting with one process, three unconditional successful fork() calls are executed by every process. How many processes exist afterward?
  1. A
    6
  2. B
    4
  3. C
    8
  4. D
    3
Question 21Single Answer
Threads in the same process normally share which resource?
  1. A
    Register set
  2. B
    Virtual address space
  3. C
    Call stack
  4. D
    Program counter value
Question 22Single Answer
Which resource normally belongs separately to each thread?
  1. A
    Executable code mapping
  2. B
    Stack
  3. C
    Open-file table of the process
  4. D
    Global variables
Question 23Single Answer
What is the principal scheduling advantage of kernel-supported threads on multiple cores?
  1. A
    They eliminate context switching
  2. B
    Threads of one process can execute in parallel
  3. C
    They cannot be preempted
  4. D
    They never access shared memory
Question 24Single Answer
In a many-to-one threading model, how many kernel threads represent multiple user threads?
  1. A
    Zero processes
  2. B
    One
  3. C
    One per user thread
  4. D
    Two per user thread
Question 25Single Answer
A blocking system call in a traditional many-to-one implementation can have which effect?
  1. A
    Convert all user threads into kernel threads
  2. B
    Automatically create a new process
  3. C
    Block all user threads mapped to that kernel thread
  4. D
    Release every application lock
Question 26Single Answer
Which model maps each user thread to a separate kernel thread?
  1. A
    One-to-many
  2. B
    Single-program batch
  3. C
    One-to-one
  4. D
    Many-to-one
Question 27Single Answer
A thread pool primarily reduces which overhead for repeated short tasks?
  1. A
    Repeated thread creation and destruction
  2. B
    IP packet fragmentation
  3. C
    Every disk seek
  4. D
    All synchronization overhead
Question 28Single Answer
What does joining a thread normally allow another thread to do?
  1. A
    Replace the process executable
  2. B
    Disable scheduling permanently
  3. C
    Merge both stacks into one stack
  4. D
    Wait for that thread to finish
Question 29Single Answer
Thread-local storage is most useful for which requirement?
  1. A
    All processes must share a physical disk
  2. B
    Every thread must modify one global counter without locks
  3. C
    A file must be stored contiguously
  4. D
    Each thread needs its own instance of a variable
Question 30Single Answer
A function is reentrant when it can safely do what?
  1. A
    Modify its own machine instructions
  2. B
    Be entered again before an earlier invocation finishes
  3. C
    Execute only once per process
  4. D
    Use unprotected global state for every call
Question 31Single Answer
Which situation is a data race in C-style shared-memory programming?
  1. A
    Separate processes reading different files
  2. B
    One thread accessing only its own stack
  3. C
    Unsynchronized conflicting accesses by different threads, with at least one write and at least one non-atomic access
  4. D
    Two threads reading an immutable value
Question 32Single Answer
What does thread safety describe?
  1. A
    Automatic encryption of thread stacks
  2. B
    The absence of all blocking operations
  3. C
    Correct behavior when a component is used concurrently
  4. D
    Guaranteed execution without context switches
Question 33Single Answer
Why can a multithreaded server remain responsive during one client's slow I/O?
  1. A
    Another runnable thread can serve other work
  2. B
    I/O requests become instantaneous
  3. C
    Shared data no longer requires protection
  4. D
    Every request receives a separate CPU automatically
Question 34Single Answer
Which term describes execution making progress on multiple tasks without requiring simultaneous execution?
  1. A
    Concurrency
  2. B
    Parallelism only
  3. C
    Deadlock
  4. D
    Defragmentation
Question 35Single Answer
Which term specifically means tasks execute simultaneously on different processing units?
  1. A
    Serialization
  2. B
    Parallelism
  3. C
    Sequential execution
  4. D
    Mutual exclusion
Question 36Single Answer
A process has four threads, but the machine has one CPU core. Which is still possible?
  1. A
    Removal of all race conditions
  2. B
    Four instructions executing simultaneously on four cores
  3. C
    Elimination of scheduler overhead
  4. D
    Concurrent execution by interleaving
Question 37Single Answer
Why should cancellation while holding a mutex be handled carefully?
  1. A
    The process gains an extra CPU
  2. B
    The mutex may remain locked unless cleanup releases it
  3. C
    Other threads automatically lose their stacks
  4. D
    Cancellation always encrypts the mutex
Question 38Single Answer
Which design avoids sharing mutable state between worker threads?
  1. A
    Using one unprotected global work buffer
  2. B
    Passing immutable task data and using isolated results
  3. C
    Updating a shared linked list without synchronization
  4. D
    Reusing a shared static temporary without locking
Question 39Single Answer
What is false sharing in a multicore system?
  1. A
    Different variables on one cache line cause unnecessary coherence traffic
  2. B
    Two processes deliberately share one filename
  3. C
    A thread receives an incorrect process identifier
  4. D
    A mutex is acquired by its owner twice
Question 40Single Answer
A serial fraction of 25% remains in a program. Under Amdahl's law, what is the maximum speedup with unlimited processors?
  1. A
    4
  2. B
    2
  3. C
    8
  4. D
    Unlimited

Reasoning

Question 41Single Answer
How many such pairs of letters are there in the word ‘CLEANLINESS’ each of the which has as many letters between them in the word as they have in the English alphabet, in the same sequence?
  1. A
    Two
  2. B
    Three
  3. C
    Five
  4. D
    Four
  5. E
    None of these
Question 42Single Answer
Team A has scored more goals than Team B
Team C has scored fewer goals than Team B
Team A has scored fewer goals than Team C .
If the first two statements are true, the third statement is
  1. A
    True
  2. B
    False
  3. C
    Uncertain
  4. D
    None
Question 43Single Answer
If it is possible to make only one meaningful word with the second, the third, the sixth and the eight letters of the word FRAGMENT using each only once, which of the following will be the third letter of that word ? If no such word can be formed, give ‘X’ as the answer and if more than one such word can be formed, give ‘Y’ as the answer.
  1. A
    A
  2. B
    E
  3. C
    T
  4. D
    X
  5. E
    Y
Question 44Single Answer
How many such letters are there in the word ORIENTAL each of which is as far away from the beginning of the word as when they are arranged alphabetically?
  1. A
    None            
  2. B
    One         
  3. C
    Two       
  4. D
    Three        
  5. E
    More than three
Question 45Single Answer
How many such pairs of letters in the word CREDIT each of which has as many letters between them in the word as in the English alphabet?
  1. A
    None
  2. B
    One
  3. C
    Two
  4. D
    Three
  5. E
    More than three
Question 46Single Answer
How many meaningful words can be made from the letters ‘LMEA’ using each letter only once in each word?
  1. A
    None
  2. B
    One
  3. C
    Two
  4. D
    Three
  5. E
    More than three
Question 47Single Answer
If it is possible to make only one meaningful word with the first, the second, the seventh and the eighth letters of the word TEMPORAL, which of the following will be the first letter of that word? If more than one such word can be made, give ‘Y’ as the answer and if no such word can be made, give ‘X’ as the answer.
  1. A
    T
  2. B
    L
  3. C
    E
  4. D
    Y
  5. E
    X
Question 48Single Answer
If the letters of the word HANDOVER are arranged alphabetically from left to right how many letters will remain at the same position?
  1. A
    None
  2. B
    One
  3. C
    Two
  4. D
    Three
  5. E
    More than three
Question 49Single Answer
How many such pairs of letters are there in the word EXCURSION, each of which has as many letters between them in the word as they have in the English alphabet?
  1. A
    None
  2. B
    One
  3. C
    Two
  4. D
    Three
  5. E
    More than three
Question 50Single Answer
If it is possible to make only one meaningful word with the first, the second, the third, the sixth and the eighth letters of the word DEVIATION first letter of that word is your answer? If more than one such word can be made formed your answer is ‘A’  and if no such word can be formed your answer is ‘B’.
  1. A
    V
  2. B
    T
  3. C
    E
  4. D
    A
  5. E
    B
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