Which of the following statements about Big Data are true? Select ALL that apply.
Answer(s): A,C
Big Data requires large volumes and computing power. Not all datasets qualify as Big Data. It is used across various departments, and computers analyze it, not just humans.
Joe is a Supply Chain Manager at Crunchy Lettuce Incorporated and is responsible for multiple sets of data on aspects of the business, including suppliers, customers, and manufacturing processes. Joe is aware that the integrity of his data is extremely important as, without accurate data, he is unable to plan effectively for future orders and deliveries.Which of the following are ways in which data integrity can be affected? Select THREE.
Answer(s): A,B,C
Commission: Data is mistakenly created, such as duplicate records. Omission: Data is accidentally deleted or not recorded. Manipulation: Data is changed incorrectly, such as an extra zero added to a value. Corruption is not included because it refers to data being unreadable or damaged rather than integrity being affected by an internal process. Corrosion refers to metal deterioration and is unrelated to data.
It is important for data to be quality controlled. One important aspect of this is for data to be contemporaneous.What does this mean?
Answer(s): C
Contemporaneous data means that the information was recorded at the exact time the event occurred. This is critical to avoid errors caused by later memory lapses. For example, a nurse administering medication should record the details immediately to avoid any potential mistakes.
Mo works in the finance department of Bubble Bear Ltd and is responsible for paying invoices to suppliers. He is conscious that the data he receives may include errors, omissions, and duplications. He wants to use IT to check the integrity of the data, as manual tests are time-consuming.What action should Mo take?
Answer(s): A
Mo should run a script, which is an automated process that checks for errors such as duplicates, missing values, and anomalies in the data. This significantly speeds up data validation compared to manual checking.
At Local Council B, data is monitored extremely closely due to its sensitive nature. A method has been put in place that provides evidence that a user has carried out an action on the IT system. For example, if an employee changes the end date of a contract with a supplier, this change is time- stamped with their name against the modification. This provides Local Council B with visibility over its data and users' actions.What is the name given to this type of control?
Answer(s): B
Non-repudiation ensures that actions taken on a system are traceable and cannot be denied. It provides an audit trail that records who made changes, when, and what was modified, preventing fraud or unauthorized data alterations.
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