Computer Science

Q.1   In Reverse Polish notation, expression A*B+C*D is written as       (A)  AB*CD*+   (B)  A*BCD*+  (C) AB*CD+*   (D)  A*B*CD+     Ans: A   Q.2    SIMD represents an organization that ______________.     (A) refers to a computer system capable of processing several programs at the same time.    (B) represents organization of single computer…

Q. What is the main difference between 16 bit and 32 bit versions of C/C++ while using in line assembler. Ans The 32-bit applications are written using Microsoft Visual C/C++ for windows and the 16-bit applications are written using Microsoft C/C++ for DOS. The main difference is that Visual C/C++ for windows is more common…

Q. Discuss the role of a bus arbiter in a multiprocessor configuration. Ans, Bus arbiter: Which functions to resolve priority between bus masters and allows only one device at a time to access the shared bus. The 8289 bus arbiter controls the interface of a bus master to a shared bus. This is designed to…

Q. Describe the operation performed by the instruction OUT 47 h, AL. Ans : It transfers the content of AL to I/O port 47h. Notice that I/O port number appears as 0047h on the 16 bit address bus and that data from AL appears on the data bus of the microprocessor. Q. Pentium processor has…

Q.1 If the crystal oscillator is operating at 15 MHz, the PCLK output of 8284 is (A) 2.5 MHz. (B) 5 MHz. (C) 7.5 MHz. (D) 10 MHz. Ans: (A) Q.2 In which T-state does the CPU sends the address to memory or I/O and the ALE signal for demultiplexing (A) T1. (B) T2. (C)…

Question 1: A collection of 8 bits is called a. byte b. word c. record   Question 2: The ascending order or a data Hierarchy is  a. bit – bytes – fields – record – file – database b. bit – bytes – record – field – file – database c. bytes – bit- field…

Question 1: Processors of all computers, whether micro, mini or mainframe must have a. ALU b. Primary Storage c. Control unit d. All of above   Question 2: What is the control unit’s function in the CPU? a. To transfer data to primary storage b. to store program instruction c. to perform logic operations d….

Question 1: Where does a computer add and compare data? a. Hard disk b. Floppy disk c. CPU chip d. Memory chip   Question 2: Which of the following registers is used to keep track of address of the memory location where the next instruction is located? a. Memory Address Register b. Memory Data Register…