GATE-IT-2004

Question 11

What is the bit rate of a video terminal unit with 80 characters/line, 8 bits/character and horizontal sweep time of lOOµs (including 20 µs of retrace time)?

• 8 Mbps
• 6.4 Mbps
• 0.8 Mbps
• 0.64 Mbps

Question 12

Consider a system with 2 level caches. Access times of Level 1 cache, Level 2 cache and main memory are 1 ns, 10ns, and 500 ns, respectively. The hit rates of Level 1 and Level 2 caches are 0.8 and 0.9, respectively. What is the average access time of the system ignoring the search time within the cache?

• 13.0 ns
• 12.8 ns
• 12.6 ns
• 12.4 ns

Question 13

Which one of the following is NOT shared by the threads of the same process?

• Stack
• Address Space
• File Descriptor Table
• Message Queue

Question 14

Let x be an integer which can take a value of 0 or 1. The statement if(x = =0) x = 1; else x = 0; is equivalent to which one of the following?

• x = 1 + x;
• x = 1 - x;
• x = x - 1;
• x = 1 % x;

Question 15

In a software project, COCOMO (Constructive Cost Model) is used to estimate

• effort and duration based on the size of the software
• size and duration based on the effort of the software
• effort and cost based on the duration of the software
• size, effort and duration based on the cost of the software

Question 16

The diagram that helps in understanding and representing user requirements for a software project using UML (Unified Modeling Language) is:  

• Entity Relationship Diagram
• Deployment Diagram
• Data Flow Diagram
• Use Case Diagram

Question 17

A software organization has been assessed at SEI CMM Level 4. Which of the following does the organization need to practice beside Process Change Management and Technology Change Management in order to achieve Level 5 ?

• Defect Detection
• Defect Prevention
• Defect Isolation
• Defect Propagation

Question 18

A software configuration management tool helps is

• keeping track of the schedule based on the milestones reached
• maintaining different versions of the configurable items
• managing manpower distribution by changing the project structure
• all of the above

Question 19

Which level of locking provides the highest degree of concurrency in a relational data base?

• Page
• Table
• Row
• Page, table and row level locking allow the same degree of concurrency

Question 20

Which one of the following statements is FALSE?

• Packet switching leads to better utilization of bandwidth resources than circuit switching.
• Packet switching results in less variation in delay than circuit switching.
• Packet switching requires more per packet processing than circuit switching
• Packet switching can lead to reordering unlike in circuit switching