Category Archives: Computer Science

Outline any THREE ways in which a transmission medium can contribute to signal errors during transmission

(a) (i) Distinguish between Forward Error Correction (FEC) and Backward Error Correction (BEC). (ii)Distinguish between longitudinal redundacy check and cyclic redundancy check as used in data communication (6 Marks) (b) Calculate the CRC needed for the transmission of data stream 1001011 (4 Marks) (c) Describe the following transmission line impairments. (i) Delay distortion (ii) Attenuation (iii) Jitter (iv) White noise (8 Marks) (d) Scramble the following data bit stream 1000 0001 1000 0000 0011 using (i) B8ZS (2 Marks)

 

 

 

 

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Scramble the following data bit stream 1000 0001 1000 0000 0011 using (i) B8ZS

(a) (i) Distinguish between Forward Error Correction (FEC) and Backward Error Correction (BEC). (ii)Distinguish between longitudinal redundacy check and cyclic redundancy check as used in data communication (6 Marks) (b) Calculate the CRC needed for the transmission of data stream 1001011 (4 Marks) (c) Describe the following transmission line impairments. (i) Delay distortion (ii) Attenuation (iii) Jitter (iv) White noise (8 Marks) (d) Scramble the following data bit stream 1000 0001 1000 0000 0011 using (i) B8ZS (2 Marks)

 

 

 

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Describe the following transmission line impairments. (i) Delay distortion (ii) Attenuation (iii) Jitter

(a) (i) Distinguish between Forward Error Correction (FEC) and Backward Error Correction (BEC). (ii)Distinguish between longitudinal redundacy check and cyclic redundancy check as used in data communication (6 Marks) (b) Calculate the CRC needed for the transmission of data stream 1001011 (4 Marks) (c) Describe the following transmission line impairments. (i) Delay distortion (ii) Attenuation (iii) Jitter (iv) White noise (8 Marks) (d) Scramble the following data bit stream 1000 0001 1000 0000 0011 using (i) B8ZS (2 Marks)

 

 

 

 

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alculate the CRC needed for the transmission of data stream 1001011

(a) (i) Distinguish between Forward Error Correction (FEC) and Backward Error Correction (BEC). (ii)Distinguish between longitudinal redundacy check and cyclic redundancy check as used in data communication (6 Marks) (b) Calculate the CRC needed for the transmission of data stream 1001011 (4 Marks) (c) Describe the following transmission line impairments. (i) Delay distortion (ii) Attenuation (iii) Jitter (iv) White noise (8 Marks) (d) Scramble the following data bit stream 1000 0001 1000 0000 0011 using (i) B8ZS (2 Marks)

 

 

 

 

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Distinguish between longitudinal redundacy check and cyclic redundancy check as used in data communication

(a) (i) Distinguish between Forward Error Correction (FEC) and Backward Error Correction (BEC). (ii)Distinguish between longitudinal redundacy check and cyclic redundancy check as used in data communication (6 Marks) (b) Calculate the CRC needed for the transmission of data stream 1001011 (4 Marks) (c) Describe the following transmission line impairments. (i) Delay distortion (ii) Attenuation (iii) Jitter (iv) White noise (8 Marks) (d) Scramble the following data bit stream 1000 0001 1000 0000 0011 using (i) B8ZS (2 Marks)

 

 

 

 

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Distinguish between Forward Error Correction (FEC) and Backward Error Correction (BEC).

(a) (i) Distinguish between Forward Error Correction (FEC) and Backward Error Correction (BEC). (ii)Distinguish between longitudinal redundacy check and cyclic redundancy check as used in data communication (6 Marks) (b) Calculate the CRC needed for the transmission of data stream 1001011 (4 Marks) (c) Describe the following transmission line impairments. (i) Delay distortion (ii) Attenuation (iii) Jitter (iv) White noise (8 Marks) (d) Scramble the following data bit stream 1000 0001 1000 0000 0011 using (i) B8ZS (2 Marks)

 

 

 

 

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State the OSI layers where segments, bits, frames and packets are handled

SECTION A QUESTION 1 (a) State the OSI layers where segments, bits, frames and packets are handled (2 Marks) (b) Identify any THREE levels of synchronization that are applicable in data communication (3 Marks) (c) Outline THREE elements of Data communication system (3 Marks) (d) Outline FOUR forms of information that can be transmitted using a data communication channel (4 Marks) (e) Classify the following transmission media as either guided or unguided (i) Infrared (ii) Coaxial cable (iii) Multimode graded – index fibre (iv) Laser (4 Marks) (f) With the aid of a diagram describe the following (i) Half duplex (ii) Full duplex (4 Marks) (g) (i) Define parallel data transmission as applied in data communication (ii)Explain TWO limitations of parallel data transmission (5 Marks) (h) State any….

define the term ‘Human resource planning

(a) Explain four principles of delegation (8 marks) (b) Line and staff organization has three types of officials with distinct roles. Explain the three types of officials. (6 marks) (c) List four sources of external recruitment (4 marks) (d) Explain four essentials of an effective control system (8 marks) (e) Explain the following terms (i) Job enlargement (ii) Job specification (4 marks)

 

 

 

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Explain the following terms (i) Job enlargement (ii) Job specification (4 marks)

(a) Explain four principles of delegation (8 marks) (b) Line and staff organization has three types of officials with distinct roles. Explain the three types of officials. (6 marks) (c) List four sources of external recruitment (4 marks) (d) Explain four essentials of an effective control system (8 marks) (e) Explain the following terms (i) Job enlargement (ii) Job specification (4 marks)

 

 

 

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Explain four essentials of an effective control system

(a) Explain four principles of delegation (8 marks) (b) Line and staff organization has three types of officials with distinct roles. Explain the three types of officials. (6 marks) (c) List four sources of external recruitment (4 marks) (d) Explain four essentials of an effective control system (8 marks) (e) Explain the following terms (i) Job enlargement (ii) Job specification (4 marks)

 

 

 

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