Computer Knowledge

Operating Systems

1,344 Questions

Test your computer knowledge with these questions on operating systems. The content covers various platforms including Unix, Linux, Windows, Android, and Macintosh. These questions are commonly asked in the computer knowledge sections of banking and government exams.

Unix emulatorsLinux distributionsAndroid software stackMacintosh operating systemsWindows OS versionsSymbian OS history

Operating Systems Questions

Multiple choice technology mainframe

What is the JCL checker utility for error correction

  1. DIOJCLCK

  2. DIOAPLCK

  3. JCLUTLCK

  4. DIOAPLCHK
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The claimed answer B (DIOAPLCK) appears to be an organization-specific JCL checker utility. Without domain knowledge of this specific organization's toolset, we rely on the marked answer. The other options (DIOJCLCK, JCLUTLCK, DIOAPLCHK) are likely distractors or similar-sounding utilities.

Multiple choice technology mainframe

What is the only statement in the EXIT para

  1. 1000-EXIT

  2. EXIT

  3. 1000_EXIT

  4. BOTH a and b
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

In COBOL and similar structured programming languages, paragraph names follow a specific format: numeric identifier followed by a descriptive name, with the separator being a hyphen. 1000-EXIT follows this convention correctly. Option B (EXIT) lacks the required numeric prefix, and Option C uses an underscore which is non-standard.

Multiple choice technology mainframe

One CICS in one processor can communicate with other CICS in other processor or other non-cics systems regardless of where the other processor or non-cics systems are physically located. Such communication is called as _____?

  1. Multi Region Operation

  2. Inter System Communication

  3. Both the above

  4. None of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The description matches Inter-System Communication (ISC), which enables CICS in one processor to communicate with CICS or non-CICS systems in other processors regardless of physical location. MRO (Multi-Region Operation) is limited to communication within the same processor, making ISC the correct answer for cross-processor communication.

Multiple choice technology mainframe

Which GET when performed on a queue deletes the records in the queue and creates a backup?

  1. MQGETS

  2. MQGETD

  3. MQGETM

  4. MQGET
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

In certain message queuing and database contexts, MQGETD is designed as a destructive get operation that retrieves and deletes records from a queue while routing them to a backup. Standard MQGET simply retrieves messages, while MQGETS and MQGETM do not perform this specific combined backup and deletion task.

Multiple choice technology operating systems

What happens when you end a disconnected session running on the remote server?

  1. all data is lost

  2. only the connection closes

  3. all applications running on the server remain active

  4. the session becomes available on the server.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

When a disconnected session ends, the session state becomes available on the server for reconnection. The applications remain running, and data is preserved. Options A and C are incorrect because data and applications persist. Option B is incorrect because more than just the connection closes - the session state changes.

Multiple choice technology programming languages

What is true about ERROR variable?

  1. d.) Will have values “TRUE” or “FALSE”

  2. c.) Will have values “YES” or “NO”

  3. b.) This variable appears in output dataset

  4. a.) Can be used in assignments/calculation in datastep.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The automatic SAS variable _ERROR_ is a numeric flag (0 or 1) that does not appear in the output dataset. However, like other automatic variables, it can be used in data step calculations and assignments.

Multiple choice technology programming languages

The sum statement is equivalent to using the SUM function and the RETAIN statement, as shown here: retain variable 0; variable=sum(variable,expression);

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The SUM statement and the SUM function+RETAIN combination are functionally equivalent. Both initialize the variable, retain its value across iterations, and add the expression value. The SUM statement 'variable+expression;' is shorthand for the two-statement form shown, making this statement True.

Multiple choice technology databases

Which process registers the logfile in a standby database ?

  1. RFS

  2. MRP

  3. ARCH

  4. LGWR
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

In Oracle Data Guard standby databases, the ARCH (archiver) process is responsible for managing archived redo log files. It registers the logfiles in the standby database's archive destination. RFS (Remote File Server) receives redo data, MRP (Managed Recovery Process) applies it, and LGWR writes redo in the primary - but ARCH handles logfile registration.

Multiple choice technology databases

Which process reads data from the data file into the database buffer cache ?

  1. Server process

  2. DBWR

  3. CKPT

  4. PMON
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

When a query needs data that's not in the buffer cache, the server process reads it from the datafile on disk into the database buffer cache in memory. DBWR writes dirty buffers to disk (opposite direction), CKPT is the checkpoint process, and PMON monitors processes - none read data files into memory. This is fundamental Oracle memory architecture.

Multiple choice technology databases

There is no entry in the file listener.ora. You issue the command "lsnrctl start". Which process will register the running instance with the listener?

  1. It will give an error

  2. PMON

  3. Default listener is started but the instance wont be registered.

  4. CJQn
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

PMON (Process Monitor) dynamically registers the instance with the listener when there's no static registration in listener.ora. When you start the listener with 'lsnrctl start', it starts successfully, and PMON automatically registers the running instance with it. This is dynamic registration - the instance will be registered despite no listener.ora entry. CJQn is the job queue process, irrelevant here.