ADV. COMMUNICATION 2024-25

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1. The core of a fiber optic cable is made of

• (a) Air
• (b) Glass
• (c) Diamond
• (d) Quartz

2. DTMF stands for:

• a. Digital Telephony Multiple Frequency
• b. Dial Tone Master Frequency
• c. Dual-Tone Multi frequency
• d. Digital Trunk Master Frequency

3. What is frequency reuse?

• a) Process of selecting and allocating channels
• b) Process of selection of mobile users
• c) Process of selecting frequency of mobile equipment
• d) Process of selection of number of cells

4. Why the shape of cell is not circle?

• a) Omni directionality
• b) Small area
• c) Overlapping regions or gaps are left
• d) Complex design

5. What happen to a call in fixed channel strategy, if all the channels in a cell are occupied?

• a) Queued
• b) Cross talk
• c) Blocked
• d) Delayed

6. What is the condition for handoff?

• a) A mobile moves into a different cell while in conversation
• b) A mobile remains in the same cell while in conversation
• c) A mobile moves to different cell when idle
• d) A mobile remains in the same cell and is idle

7. The time over which a call can be maintained within a cell without handoff is called

• a) Run time
• b) Peak time
• c) Dwell time
• d) Cell time

8. What are co-channel cells?

• a) Cells having different base stations
• b) Cells using different frequency
• c) Cells using adjacent frequency
• d) Cells using same frequency