A public key encryption system
A. allows anyone to decode the transmission
B. allows only the correct sender to decode the data
C. allows only the correct receiver to decode the data
D. does not encode the data before transmitting it
E. None of the above
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Feed back queue
A. are very easy to implement
B. dispatch tasks according to execution characteristics
C. are used to favor real-time tasks
D. require manual intervention to implement properly
E. None of the above
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In which addressing mode the operand is given explicitly in the instruction?
A. absolute mode
B. immediate mode
C. indirect mode
D. index mode
E. None of the above
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The technique, for sharing the time of a computer among several jobs. Which switches jobs so rapidly such that each job appears to have the computer to itself:
A. time sharing
B. time out
C. time domain
D. FIFO
E. None of the above
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Capacity planning
A. requires detailed system performance information
B. is independent of the operating system
C. does not depend on the monitoring tools available
D. is not needed in small installations
E. None of the above
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Poor response times are caused by
A. Processor busy
B. High I/O rate
C. High paging rates
D. Any of the above
E. None of the above
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Link encryption
A. is more secure than end-to-end encryption
B. is less secure than end-to-end encryption
C. can not be used in a public network
D. is used only to debug
E. None of the above
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A form of code that uses more than one process and processor, possibly of different type, and that may on occasions have more than one process or processor active at the same time, is known as
A. multiprogramming
B. multithreading
C. broadcasting
D. time sharing
E. None of the above
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The table created by lexical analysis to describe all literals used in the source program is
A. Terminal table
B. Literal table
C. Identifier table
D. Reductions
E. None of the above
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The term 'polling' in a computer means a process by which a computer system
A. detects/corrects errors
B. multiplexes the inputs and updates the memory accordingly
C. decides correct alternative by analysing several ones
D. inquires to see if a terminal has any transaction to send
E. None of the above
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In which addressing mode, the address of the location of the operand is given explicitly as a part of the instruction.
A. absolute mode
B. immediate mode
C. index mode
D. modulus mode
E. None of the above
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Under virtual storage,
A. a single program is processed by two or more CPUs
B. two or more programs are stored concurrently in primary storage
C. only the active pages of a program are stored in primary storage
D. interprogram interference may occur
E. None of the above
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A base register table
A. allows the programmer to write base registers and displacements explicitly in the source program.
B. is used to remember which of the general-purpose registers are currently available as base registers, and what base addresses they contain.
C. allows multiple programs to reside in separate areas of core at the same time.
D. is a term that refers to the control programs of an operating system.
E. None of the above
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File record length
A. should always be fixed
B. should always be variable
C. depends upon the size of the file
D. should be chosen to match the data characteristics
E. none of the above
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A relationship between processes such that each has some part (critical section) which must not be executed while the critical section of another is being executed, is known as
A. semaphore
B. mutual exclusion
C. multiprogramming
D. multitasking
E. None of the above
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What is the name of the operating system which was originally designed by scientists and engineers for use by scientists and engineers?
A. XENIX
B. UNIX
C. OS/2
D. MS DOS
E. None of the above
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The most common security failure is
A. carelessness by users
B. depending on passwords
C. too much emphasis on preventing physical access
D. insufficient technology used to prevent breaches
E. None of the above
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Terminal Table
A. contains all constants in the program
B. a permanent table of decision rules in the form of patterns for matching with the uniform symbol table to discover syntactic structure.
C. consists of a full or partial list of the token's as they appear in the program. Created by Lexical analysis and used for syntax analysis and interpretation
D. a permanent table which lists all key words and special symbols of the language in symbolic form.
E. None of the above
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Block or buffer caches are used
A. to improve disk performance
B. to handle interrupts
C. to increase the capacity of main memory
D. to speed up main memory read operation
E. None of the above
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The practice of "bundling" refers to
A. selling computers alone
B. selling peripheral devices with computer
C. selling software to run on computers
D. giving away software with a computer purchase
E. None of the above
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